Screw-Mounting Bar for Concrete Pump Boom Pedestal
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Solution Overview
Problem
Conventional vehicle-mounted concrete pumps face limitations in structural space utilization and stability due to the standard size of I-shaped steel carriers, which restrict the height of the boom pedestal and require welding, leading to complex assembly and potential distortion.
Innovation Solution
The introduction of a screw-mounting bar with multiple assembly recesses and screw channels between the boom pedestal and profile carriers allows for increased stability and reduced height, enabling screw connections instead of welding, facilitating easier assembly, reduced distortion, and improved transportability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a conventional I-shaped profile carrier with smaller height is used, then the structural height is reduced, but the resistance torque of the boom pedestal is decreased
Solution Approach 1:
The patent transitions from a vertically-oriented I-shaped profile carrier to a horizontally-oriented screw-mounting bar. By changing the orientation and dimension of the connection element, the system achieves increased resistance torque through greater width while maintaining reduced overall structural height, effectively resolving the contradiction between height and torque capacity.
Solution Approach 2:
The invention changes key geometric parameters of the connection means between the boom pedestal and profile carrier. The screw-mounting bar features optimized width and height dimensions, with width greater than height, and includes strategically positioned assembly recesses and screw channels. These parameter changes enable both reduced structural height and increased resistance torque through improved geometric configuration.
2Strength
If welding is used for assembly, then the connection strength is improved, but the assembly time and cost increase
Solution Approach 1:
The patent replaces the welding process (thermal/chemical joining) with a mechanical screw connection system. The screw-mounting bar incorporates assembly recesses and screw channels that enable straightforward mechanical fastening, eliminating the need for welding operations while maintaining adequate connection strength and significantly reducing assembly time and cost.
Solution Approach 2:
The screw-mounting bar acts as an intermediary component between the boom pedestal and the profile carrier. This intermediate element provides a standardized interface with pre-formed assembly recesses and screw channels, facilitating simplified mechanical connection without requiring direct welding between the main structural components.
3Strength
If welding is used for assembly, then the connection strength is improved, but distortion occurs during assembly
Solution Approach 1:
By replacing welding with mechanical screw connections, the patent eliminates the thermal processes that cause distortion in welded structures. The cold-forming and assembly of the screw-mounting bar with its recesses and channels avoids heat-affected zones, preventing distortion while maintaining connection integrity through properly designed mechanical fastening.
4Strength
If the boom pedestal subassembly is made larger, then the resistance torque is increased, but the transportability and ease of installation are reduced
Solution Approach 1:
The patent optimizes the dimensional configuration of the boom pedestal subassembly by using a screw-mounting bar with width greater than height. This dimensional reconfiguration increases resistance torque through greater width while keeping the height dimension small, ensuring the subassembly remains compact and易于 transport and installation without sacrificing structural performance.
Data Source
AI summary
Disclosed is a vehicle-mounted concrete pump comprising a vehicle and a concrete distributor boom which can be transported thereon and which is mounted on a boom pedestal in such a way as to be able to rotate about a vertical axis and in such a way as to be able to pivot about a horizontal axis, wherein the boom pedestal is held on profile supports of an installation frame on the vehicle via connecting means. According to the disclosure, it is proposed that a screw attachment bar is arranged as connecting means between the boom pedestal and each profile support, wherein the screw attachment bar has, distributed over its length, a plurality of assembly recesses and screw channels opening into the latter for screw connections to the profile support.